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Sensitivity and specificity of selected clinical decision rules.13–16,19 Breese: CDR considered positive for a score of 26 or higher out of a possible score of 38, based on a complex weighted score using nine features.13 McIsaac: CDR considered positive for presence of four of six features.14 Wald: CDR considered positive based on presence of four of six features.15 Steinhoff: CDR considered positive for presence of tonsillar exudate or enlarged cervical lymph nodes.16
